Title 05.MS- AAC block work 22-2-16.pdf ✅

ASHIANA HOUSING LIMITED METHOD STATEMENT FOR BLOCK-WORK INTRODUCTION / SCOPE This method statement covers the requirements, equipments and procedures to be used for AAC block work. REFERENCE Following documents shall be considered as reference for execution of the job: a) Architectural GFC drawings provided by consultant. b) Site instructions. c) Checklist for Block work MATERIAL AAC Block, Stone dust, PPC Cement, Water, Steel Bars, Aggregate, Chicken wire mesh. APPARATUS / EQUIPMENT Mixer machine, Measuring box, Right angle, Grooving tools, Hand saw, Trowel, Plumb, Bucket, Thread, Scraper, Brick Hammer, Spirit Level or Bubble Tube, Steel Tape, Aluminum fanti ,
HEALTH AND SAFETY PROVISION a) The work place is to be free from all kind of debris. b) Specific safety measures are to be followed as applicable. c) All working platforms are to be inspected. d) Use of Mask during AAC Blocks cutting. PREPATORY WORK a) Obtain relevant approved GFC drawings. b) Hacking on the contact area of vertical RCC surface to be done and chicken wire mesh to be fixed with cement slurry. c) Layout should be done as per the drawings before commencing block work. d) Arrange for all materials such as AAC blocks(600*200*200 & 600*100*200), cement, stone dust and steel e) Cement for next day early hour work to be issued in advance. f) Arrange any support structure like staging for working at heights. g) Empty cement bags, of 3’ width to be laid before starting of Block work. WORKMANSHIP- BLOCK WORK Strength: a) AAC Blocks used in block work shall be of approved strength and shall be true to the shape and dimensions. b) One Steel bar of 8mm should be used after every 3rd layer in 100 mm block work. c) Cement mortar should be 1:6 with the thickness of 10mm with proper mixing by mixer machine. Line and Level: a) Block work should be in proper line, level and plumb. b) Block work of 100 mm should not be raised more than 1200 mm in one day. PROCEDURE OR METHODOLOGY a) Chipping should be done on all RCC members so as to remove any extra concrete on the surface. b) Block surface can be moistened gently using sprinkler water c) Layout should be done according to the GFC drawing.
d) Chicken wire mesh to be fixed with cement slurry in contact with RCC surface and AAC blocks. The total gap between RCC and block work should not be more than 15mm, this thickness includes cement paste, chicken wire mesh and thickness of mortar. e) Proper mortar shall be prepared for 200mm and 100mm block work, i.e., 1:6 ( 1 cement: 6 sand), (NOTE- Do Not USE RICH MORTAR) f) Bottom layer should be done using a thick layer of 1:6 cement sand mortar to help in leveling. g) Corner blocks are to be laid first. h) Maintain a regular pattern of masonry. Blocks are to be laid one over the other with minimum 1/3rd or 100 mm overlapping (whichever is more) i) 1 Nos-8mm dia steel bar is to be put after every 3rd layer in 100mm block work. Steel should be inserted 25mm in column, using the hammer drill. j) Proper use of plumb and thread is to be made for correct alignment in vertical and horizontal directions. a. k) Block joints should be cleaned with the use of fiber blade. l) Clean the area after block work. m) Date of construction should be marked on block work. n) Curing should be done at all joints with sprinkler for 7 to 10 days. o) Mullion (A RCC column size-150mm x thickness of wall of M20 grade of concrete with 4 no’s 10mm dia steel with 8mm dia ties @150mm c/c imbedded in top beam & bottom slab with HY150 Hilti chemical) to be provided in all doors & window opening. p) Diagonal and right angles of the room should be as per requirement. q) On placing the next block, joints between the two blocks is to be fully filled with mortar, so that no hollow space is left between the blocks.